Automatic governor.



F. TERRY. AUTOMATIC GOVERNOR. APPLICATION FILED MAY ls. 1917.

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ell'to'cne 14 1.1mm. AUTOMATIC GOVERNOR. APPLICATION FILED MAY I8.` 1917. 1 256 612., Patented Feb.19,1918.

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v YNXYN Tummy, oi W Gnomz FRANK TERRY, 0F DETROIT, MICHIGAN.

AUTOMATIC GOVERNOR.

Speeication of Letters Patent.

Patented Feb. 19, 1918.

Application filed May 18, 1917. Serial No. 169,524.

To all whom it may concern: v Be it known that I, FRANK TERRY, a citizen of the United States, residing at Detroit, in the county of Wayne and State -of Michigan, have invented certain new and useful Improvements in AutomaticGovernors; and 'I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled 1n the art to which it appertains to make and use the same, reference being had to the -accompanying drawings, and to the letters and figures 'of reference marked thereon, which form a part of this specication.

This invention relates to 'new and useful improvements in automatic governors for motor trucks, etc., and the object of the inventionis to -produce an apparatus of this nature so constructed and operated that it will govern the speed of the truck without having effect upon the speed of the motor, the device being driven by a suitable shaft instead of the timing gears of governors commonly in use.

The invention comprises a simple and eiicient device of this nature having various details of construction, combinations and arrangements of parts which will be hereinafter fully described, shown in the accompanying drawings and then specifically defined in the appended claim.

I illustrate my invention in the accompanving drawings, in which Figure 1 is a View showing the application of my invention to a motor truck, parts being in vertical section to better illustrate features of the invention.

Fig. 2 is a sectional view longitudinally through governor actuating mechanism.

Fig. 3 is a sectional view on line 3-3 of Fig. 1, looking in the direction of the arrow.

Fig. 4 is a sectional Fig. 1,.

Fig. 5 is a sectional view on line 5-5 of Fig. 1.

Reference now being had to the details of the drawings by numeral, 1 designates a carbureter of the engine mounted upon the truck 2, and 3 is a manifold having a passageway leading therefrom in which a butterfly valve 4 is positioned, being mounted upon a shaft 5, which shaft has a crank arm 6 fastened thereto and which in turn is connected to a rod 7. The main driving view on line 4--4 of shaft of the engine is designated by numeral 8 and has a loosely mounted gear 9 journaled thereon which has a recess 10 in its face adapted to be engaged by a pawl11, mount'- ed in a recess in a disk 13, keyed to the shaft 8 and which pawl has its free end inclined and is held at its farthest outer limit through the medium of the coiled spring 12. Said wheel 9 and disk 13 are mounted in a suitable casing 14' and in the walls of which a stub shaft 15 is journaled, to-which a gear wheel 16 is keyed, which is in mesh with the loosely journaled gear wheel 9. The governor shaft is hollow and is designated. bv numeral 17, shown clearly in section in Fig. 2 of the drawings, and which at one end is interiorly threaded to receive a circumferentially threaded plug 18, having an eye 19 to which one end of a chain 20 is connected, which chain in turn is connected to one end of the stub shaft 15, as shown clearly in Fig. 1 of the drawings. Said governor shaft has diametrically opposite slots 21 formed therein, as shown in Fig. 2, and lugs project from the shaft adjacent the slots and carry pivotal pins 22 upon which governor arms 23 are pivotally mounted.

Governor balls 24 are pivotally mounted, one at each end of the governor arms 23 and are adapted to contact with the circumference of the hollow governor shaft, being held in contact therewith through the medium of the coiled spring 25, shown in Fig. 1 of the drawings. Slotted guide'bars, designated by numeral 26, are pivotally connected at 27, one upon each governor arm, and through which a' pin 28, secured to the shaft, passes. These bars serve to limit the outer swinging movements of the arms farther than a predetermined point.

Mounted within the hollow governor shaft is a solid shaft 29 having an annular groove 30 formed near one end in which the inner ends of the governor arms are positioned. Mounted within the hollow shaft 17 is a .cylindrical block or member 31, having an annular groove 32 therein, and 33 is a coiled spring mounted within the shaft -17 and bearing intermediate the threaded plug 18, with which it has frictional contact, and the end of the block orvmember 31, the purpose of said spring being to hold one end of the member 31 in contact with the longitudinally movable shaft 29. A. bell crank lever 34 is mounted upon a pin 35, supported in the walls of the casing 36, which latter surrounds the governor-actuated mechanism and which bell crank lever has one end bifurcated, provided with two arms 37, shown clearly in section in Fig. 3, each arm having an inwardlyI extending lug 38 mounted in an annular recess 39, formed in the collar 40 and which collar is loosely mounted'upon the shaft 17 and which is swivelly mounted and provided with pins 41 projecting within the bore of the collar at points diametrically opposite and which engage the annular groove 32 formed in the member 31. One arm 42 of the bell crank lever 34 is ivotally connected at 43 to an end of the rod A suitable casing 36", of tubular form, telescopes over portions of the casings 36 and 14 and serves as a protection to the chain 20 within.

An adjusting nut 44 is mounted upon a threaded portion of the circumference of the shaft 17 and is adapted to form an abutment to the collar 40, limiting its movement in one direction.

The operation of my invention will be readily understood and is as follows In the event of excessive speed being imparted to the shaft 17 through the medium of the connections between the same and driving shaft 8, the governor arms will be swung upon their pivots, causing a longitudinal movement to be imparted to the shaft 29 in one direction, causing the member 31 to move and with it the bell crank lever 34 will be caused to tilt upon its pivot 35 and will cause the valve 4, through the medium of the connections between the salme and the bell crank lever, to tilt, thus constricting the passageway through which the fuel is fed to the manifold of the motor, thus cutting ofl' the fuel and slacking the movement of the motor. As the speed of the governor shaft is slackened, the coiled spring 25 will throw the governor arms back toward their normal position, the spring 33 serving to return the shaft 29 to its normal position, thus causing the valve 4 to again return to its former position, permitting more fuel to pass to the motor.

y the provision of the apparatus ernbodying the features of my invention, it will be noted that a simple and efficient means is provided whereby the speed of the truck will have no effect upon the speed or power o f the engine, the mechanism being automatlc in its action and at all times the speed of the motor regulating the supply of the fuel. By the construction shown, it will be noted that the governor may be driven by the drive shaft back of the transmission and that, upon reverse movement of the motor, the pawl will turn idly, the governor actuating mechanism being at provision of the means shown, balls will be permitted to spin freely when brakes are applied suddenly and wheels stopped without throwing any strain upon the chain or the governor shaft.

What I claim to be new is In combination with an automatic governor apparatus acasing, a hollow rotatable shaft sitely disposed longitudinal slots, a longitudinal movable governor actuated shaft within the hollow shaft, a cylindrical block within the hollow shaft and provided with an annular groove, a movable collar mounted upon said hollow shaft and having pins projecting toward each other and having swivel connection with the annular groove of said block, a plug having threaded connection with one end of the hollow shaft, a spring interposed between the end of Said block and plug, the latter having an eyelet, a driving gear having a hub mounted in suitable bearings and a chain connected at one end to said hub and its other end to said eyelet.

In testimony whereof I hereunto affix my signature in presence of two witnesses.

FRANK TERRY.

the governor Witnesses:

J. V. BELoTE, T. ARTHUR HOFFMAN.

rest. By the mounted therein and having oppoj 

